Relative clauses 1. She bought the car. Her mother had recommended it. 2. He lost the pencil yesterday. I bought it for him. 3. Lana called the delivery company. Her friend often uses it. 4. Lam met a young man. I used to work with him for a very long time. 5. Sana called the lawyer. My mother knows her very well. Ai giúp với

`1.` She bought the car which/that her mother had recommended.

`2.` He lost the pencil which/that I bought for him yesterday.

`3.` Lana called the delivery company which/that her friend often uses.

`4.` Lam met a young man whom/that I used to work with for a very long time

`5.` Sana called the lawyer whom/that my mother knows very well.

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who : dùng cho người, chủ ngữ hoặc tân ngữ

whom : dùng cho người, tân ngữ trong một số trường hợp trang trọng

which : dùng cho vật, chủ ngữ hoặc tân ngữ

that - có thể dùng thay cho "who" hoặc "which" trong mệnh đề được xác định

whose : dùng để chỉ sự sở hữu